XIV, 5 Yates: Growth of Hevea Brasiliensis 507 
distributed rainfall of any of the stations listed, Cotabato is, 
however, a very close second. 
Rainfall data from various localities in the East where Para 
rubber is being successfully grown are compiled in Table IV. 
Table IV . — Average rainfall in rubber-producing districts of the Orient. 
[Rainfall is given in millimeters.] 
Ceylon, 1905-1908.“ 
Malaya. 
Borneo, 1910-1913.4 
Month. 
Perade- 
niya. 
Henarat- 
?oda. 
Kuala 
Lumpur, 
F. M. S. 
1915-1916." 
Singapore. 
1914-1916. c 
Penang. 
1914-1916.= 
Sandakan. 
Jesaelton. 
January 
67.0 
47.8 
74.9 
322.3 
50.0 
301.2 
106.9 
February 
66.5 
95.8 
63.3 
88.3 
80.8 
249.7 
72.9 
March 
100.0 
125.5 
201.6 
228.1 
237.6 
137.2 
46.7 
April 
137.4 
220.7 
297.4 
263.7 
212.3 
117.6 
133.1 
May 
133.1 
304.8 
136.7 
132.6 
316.6 
126.6 
209.8 
June 
241.3 
234.6 
170.9 
163.3 
251.2 
114.8 
807.1 
July... 
211.8 
111.2 
228.2 
211.8 
302.8 
164.4 
209.0 
August 
122.9 
74.4 
237.9 
157.6 
224. 5 
212.3 
249.4 
September 
168.1 
123.9 
133.7 
148.0 
364.1 
364.5 
363.1 
October 
374.4 
449.6 
188.3 
149.9 
458.2 
227.8 
436.4 
November 
173.7 
361.7 
193.2 
252.2 
305.6 
292.6 
280.2 
December. 
131.0 
65.5 
167.3 
237.0 
152.1 
364.6 
139.2 
Total 
1, 927. 2 
2, 215. 6 
2, 083. 4 
2,344.6 
2, 945. 6 
2, 663. 0 
2, 642. 8 
“ Report of the director. Royal Bot. Gardens of Ceylon (1906-1909). 
"Supplement to the Official Gazette, F. M. S. Selangor Administrative report (1916-1917). 
'The Gardens’ Bulletin, Straits Settlements ( 1914-1916 ) . 
'' Manual of Statistics of British North Boimeo (1916). 
TEMPERATURE 
Hevea brasiliensis appears to reach its best development in 
regions having a comparatively high and uniform temperature 
throughout the year. At Belem (Para) near the mouth of the 
Amazon and about 1° south latitude the minimum temperature 
recorded during a period of three years was 20.2° C„ and the 
maximum, 36,6° C. ; the average yearly maximum for this period 
was 32.04° C., and the average yearly minimum, 22.23° C. 
In the Philippines the lowest temperature recorded during a 
period of three years (1913-1915) at Davao was 19.0° C. ; at 
Cotabato, 19.2° C.; and at Jolo, 20.2° C. During this period 
the maximum temperature at Davao was 36.0° C.; at Cotabato, 
36.0° C. ; and at Jolo, 33.4° C, In general the temperature in 
the Mindanao region appears to range between about 20° and 
34° C, and is fairly uniform throughout the year, except for a 
somewhat warmer period during February, March, and April, 
when the temperature occasionally reaches 36° or 37° C. 
166669 4 
